HARTMANN, Hans; MAIER, Leonhard. Qualitätsunterschiede bei biogenen Festbrennstoffen. agricultural engineering.eu, [S. l.], v. 55, n. 2, p. 162–163, 2000. DOI: 10.15150/lt.2000.1872. Disponível em: https://www.agricultural-engineering.eu/landtechnik/article/view/2000-55-2-162-163. Acesso em: 4 mai. 2024.